18105916942 has 4 divisors (see below), whose sum is σ = 27158875416. Its totient is φ = 9052958470.

The previous prime is 18105916937. The next prime is 18105916967. The reversal of 18105916942 is 24961950181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18105916892 and 18105916901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4526479234 + ... + 4526479237.

It is an arithmetic number, because the mean of its divisors is an integer number (6789718854).

Almost surely, 2^18105916942 is an apocalyptic number.

18105916942 is a deficient number, since it is larger than the sum of its proper divisors (9052958474).

18105916942 is an equidigital number, since it uses as much as digits as its factorization.

18105916942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9052958473.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 18105916942 in words is "eighteen billion, one hundred five million, nine hundred sixteen thousand, nine hundred forty-two".